Frequency spectrum efficiency optimization method for wireless energy-carrying communication system based on hybrid precoding

Abstract

The invention discloses a method for optimizing spectrum efficiency of a wireless energy-carrying communication system based on hybrid precoding. The method comprises the following steps: S1, obtaining an analog precoding matrix F from a base station BS in the wireless energy-carrying communication system through a step-by-step greedy selection algorithm; S2, enabling the base station BS to maximize the spectrum efficiency of the simultaneous wireless information and power transfer system through a soft interference elimination algorithm under the condition that constraint conditions are met, and obtaining a digital precoding matrix B; S3, transmitting information by the base station BS through the analog pre-coding matrix F and the digital pre-coding matrix B so as to maximize the spectrum efficiency of the simultaneous wireless information and energy transfer system. In the signal transmission process, the service range of the SWIPT can be expanded, certain energy is provided for an energy receiver, and a higher data rate can be provided for a user by using the millimeter wave Massive MIMO technology; and a hybrid precoding structure is adopted, so that the hardware complexity and energy consumption of the system are reduced.

Description

technical field [0001] The invention relates to the field of wireless transmission, in particular to a method for optimizing spectrum efficiency of a wireless portable energy communication system based on hybrid precoding. Background technique [0002] As the network grows, equipment access and service requirements are increasing, spectrum resources are becoming increasingly scarce, and the required energy consumption is also greatly increasing. Due to the short millimeter wave wavelength and small antenna size, a large number of antennas can be integrated in a limited space; and Massive Multi-Input Multi-Output (Massive MIMO) technology uses beamforming to provide high gain, which can compensate Millimeter wave has serious path loss; therefore, the combination of millimeter wave and Massive MIMO technology can greatly improve the spectral efficiency of the system and alleviate the problem of global spectrum resource scarcity. It is a key technology for next-generation commu...

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Problems solved by technology

[0005] The purpose of the present invention is to address the deficiencies of the prior art, in order to solve the problems of spectrum scarcity and energy consumption, improve the service distance range of SWIPT, maximize the system spectrum efficiency under the condition of ensuring the lowest energy acquisition of energy users in the system, and provide a A Spectrum Efficiency Optimization Method for Wireless Portable Communication System Based on Hybrid Precoding

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